Car roof



March 1,. W.

D. W. HAWKSWORTH CAR ROOF 'Filed Sept. 21, 1936 2 Sheets-Sheet 1INVENTOR DAVID W. HAWKSWORTH A TTORNEYS 2 a M H e .M. m. s E m 2 t \Vm rv e K m WW; H W D H V m WW M. 9 o l wFL SW2 K mmw H m m D arch 1,

Patented Mar. 1, 1938 I s I v OAR ROOF David W. Hawksworth, Birmingham,Mich., assignor to Chicago-Hutchins Corporation, a corporation ofDelaware Application September 21, 1936, Serial No. 101,845

8 Claims. (01. 108-54) The invention relates to car roofs of the rigidgreatly increase the rigidity, while at the same all-metal type and itis the primary object of time sufficient slope is retained to providefor the invention to obtain a construction which proper drainage. Theportions H of the sheets can be formed from relatively light gauge metalwhich overlie the carlines preferably remain in of high tensilestrength, thereby reducing the the original plane and may be secured tothe 5 weight of the roof. It is a further object to obcarlines byriveting, as indicated at I. Thus the tain with such construction a highdegree of portions between the carlines are not only rigidity inwithstanding load stresses. With stepped, but are also invertedpan-shaped which these objects in view, the invention consists infurther increases rigidity. As shown in Figure UNITEDJSTATES PATETOFFICE the construction as hereinafter set forth. 3, all portions of thesheets are above the plane 10 In the drawings: of the top face of thecarline. In Figure 4, this Figure 1 is a plan view of a portion of aroof construction is modified by depressing portions J of my improvedconstruction; on opposite sides of the carline which also per- Figure 2is an enlarged cross section theremits of forming somewhat deeper Stepswithout through on line 2--2'of Figure 1; decreasing outside clearance.In the construc- 15 Figure 3 is a cross section on line 3-3 of Figtionshown in Figure 5, in place of panning the we 2; sheets intermediate thecarlines, as previously Figure 4 is a similar view showing a slightlydescribed, they are stepped throughout their enmodified construction;tire width and the carline B has its upper end Figure 5 is a viewsimilar to Figure 2 showing similarly stepped, as indicated at B toreceive 20 th modification, the sheets. At the eaves the sheets areprovided Car roofs of th t to whi h my improvewith a curved anddown-turned end portion K ment belongs are usually formed of relativelywhich may be secured to a side plate L by heavy gauge sheet metal, suchfor instance as veting.

Iii-gauge, said sheets extending either from ridge W at I cl im as myinvention is: 5

to eaves or from eaves to eaves and being sup- In a rOOf, the C mb ationWith carported by and rigidly attached to carlines. Such line of aroofing sheet pp d h r n havin a construction will have not only thenecessary a portion extending between carlines formed in tensilestrength in the roofing sheets, but also a a ies f p a e 1. each p beingow considerable degree of rigidity to withstand dewardly inclined towardthe eaves to provide 30 fiections. With the present invention Icondrainage a d being connefited the adjacent siderably decrease thetotal weight of the roof lower step by a transverse portion extendingsubby employing a light gauge metal, such as 20- stantially from carlineto carline and forming a gauge, but select a material which is muchhigher stiffening flange.

in tensile strength than that usually employed in 2. In a car roof, thecombination with car- 35 such type of roofs. However, sheets of suchlight lines, of a roofing she pp d thereon nd gauge metal whilepossessing the necessary tensile rigidly attached thereto, said sheethaving a porstrength will be much less rigid in withstanding tionextending between carlines formed in a sedefiections than the heaviergauge metal. I ries of parallel steps, each step being downwardly 40have, therefore, devised a construction which iminclined toward theeaves for drainage and be- 40 parts the desired degree of rigidity withsuch ing connected to the adjacent lower step by a light gauge material.As shown in Figures 1 transverse portion extending substantially fromand 2, A and A are roofing sheets each of which carline to carline andforming a stiifening flange. extends transversely from ridge to cavesand 3. In a car roof, the combination with carlongitudinally to cover aplurality of carlines B. lines, of a roofing sheet supported thereon and45 The transverse edges of adjacent sheets may be rigidly attachedthereto, said sheet having interoverlapped on one of the carlines asindicated mediate the carlines inverted pan-shaped porat C and at theridge may be united to each tions forming a series of parallel steps,each step other in any suitable manner, such as by upbeing inclineddownward toward the eaves for standing flanges D covered by a cap E. Toimdrainage and being connected with the adjacent 50' part the desiredrigidity to the sheets, the porlower step by a transverse portionextending tions intermediate the carlines are pressed to substantiallyfrom carline to carline and, forming form a series of steps F, F, etc.,or a washboard a stiffening flange. effect having substantiallyvertically extending 4. In a car roof, the combination with carportionsG between adjacent steps. These will lines, of a roofing sheet supportedon said car- 55 lines, said sheet having intermediate the carlinesinverted pan-shaped portions forming a series of parallel steps, eachstep being inclined downward toward the eaves for drainage and connectedto the adjacent lower step by a transverse portion extendingsubstantially from carline to carline and forming a stiffening flange,the portions of said sheet overlying the carlines conforming to theupper surface thereof and being rigidly attached thereto.

5. In a car roof, the combination with carlines, of a roofing sheethaving portions over lying the carlines substantially in the plane oftheupper face thereof and attached thereto and a. portion intermediate thecarlines formed in a series of parallel steps, each step being inclineddownward toward the eaves for drainage and being connected to theadjacent lower step by a transverse portion extending substantiallyfromcarline to carline and forming a stifiening' flange.

6. In a car roof, a roofing sheet extending from ridge to eaves formedin a series of parallel steps, each step' inclining downward toward theeaves for drainage and being connected to the adjacent lower step by atransverse portion forming a longitudinally extending stiffening flange,

and a carline for supporting said sheet having a similarly stepped upperportion for engaging the steps in the sheet.

7. In a car roof, the combination with carlines, of a roofing sheetsupported thereon extending from ridge to eaves and overlying more thantwo carlines being rigidly secured thereto, the portions intermediatethe carlines being formed in a series of steps; each step incliningdownward from ridge toward eaves for drainage and being connected to theadjacent lower step by a transverse portion forming a stiffening flange.

8. In a car roof, the combination with carlines, of a roofing sheetoverlying said carlines and supported thereon, said sheet having aportion intermediate the carlines formed in a series of parallel steps,each step being inclined downward toward the eaves for drainage andconnected to the next lower step by a portion forming a stiffeningflange, the transverse portion extendingsubstantially-from carline tocarline and said sheet overlying each carline being substantially in theplane of the upper face thereof and being turned'downward at the side ofthe carline to merge into said stepped portion.

DAVID W. I-IAWKSWORTH.

